Update deleted all my songs and pictures?
Today I decided to finally update my iPod touch after not having done so for atleast 2 years. Before I updated it I backed it up to my computer. When I completed the update, I saw all my songs, videos, and apps had been deleted. When I went to my iPod iTunes store to redownload all my purchases, it showed I had 499 purchased songs, which is correct. However, downloading it through my iPod was taking too long so I tried to download them again on my computer. When the songs had finished downloading it showed there were only 193 songs. I tried to restore my iPod to the backup, but nothing changed. Everytime I tried the iPod would just start up as if I had just updated it again. Any advice? The restore doesn't seem to be doing anything. I updated from 4.3.3 to 5.1.1
iPod touch, iOS 5.1.1